feat: add PageMeta to 16 pages for SEO and proper browser tab titles

Public pages (Login, Register, Forgot/Reset Password, Verify Email,
Survey Thank You) get descriptions for SEO. Authenticated pages
(Dashboard, Flow Library, My Flows, Session History, AI Assistant,
Account Settings, Step Library, My Shares, Feedback, Guides) get
proper tab titles.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/pages/AccountSettingsPage.tsx

@@ -1,6 +1,7 @@
 import { useEffect, useState } from 'react'
 import { Link } from 'react-router-dom'
 import { Building2, Users, Mail, Crown, Loader2, AlertCircle, Check, X, Settings, FolderTree, Server, RefreshCw, MessageSquareText, UserCog, AlertTriangle, Clock } from 'lucide-react'
+import { PageMeta } from '@/components/common/PageMeta'
 import { accountsApi } from '@/api/accounts'
 import type { Account, AccountMember, AccountInvite } from '@/types'
 import { TransferOwnershipModal } from '@/components/account/TransferOwnershipModal'
@@ -159,6 +160,8 @@ export function AccountSettingsPage() {
   const sub = subscription?.subscription
 
   return (
+    <>
+    <PageMeta title="Account Settings" />
     <div>
       <div className="mb-8">
         <div className="flex items-center gap-3">
@@ -678,6 +681,7 @@ export function AccountSettingsPage() {
         <DeleteAccountModal onClose={() => setShowDeleteModal(false)} />
       )}
     </div>
+    </>
   )
 }